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I am a beginner in 3D printing and recently bought an Ender 3. With the filament included in the package, my first print ever was flawless. However, after the first print, I tried printing with ABS, which did not work out, so changed to PLA, and ever since then, all my prints were under extruded. I have tried everything. I bought a new nozzle to make sure it wasn't clogged, I cut the last 20 mm of the PTFE tube, I performed cold pulls, I leveled my bed before every print, made the line width in the profile 0.48 mm instead of 0.4 mm, increased the flow, tried printing with every temperature between 185-210 °C, looked at different Ender 3 suggested profiles on the internet, and more. I also made sure there was nothing wrong with the extruder. Attached are pictures of my most recent prints. Anyone who can tell me what I am doing wrong???

enter image description here enter image description here

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The helical exterior is an indicator of a filament diameter mismatch or volumetric mode enabled for linear commands

From ref:

Then you probably enabled volumetric extrusion by accident.

On LCD go to

  • Control
  • Filament
  • Disable
  • Save EEPROM
  • Revert estep cal if applicable.

What is it? M200

Its a feature of Marlin firmware which interprets E moves as mm3 instead of linear mm. It is poorly described in the menu, and tends to be enabled by accident.

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in what way did the ABS print fail? you might want to check the extruder mechanism and ensure it still bites into filament properly. shredded filament on the hobbed gear can cause unpredicatble underextrusion.

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